golang implements a simple udp protocol server and client example

The example of this article describes the implementation of golang simple udp protocol server and client. I will share it with you for your reference as follows:

In fact, udp does not have any concept of server and client. It just sends and receives one by one, which is easy to recognize and understand.

Server:

package main

import (

    "fmt"

    "net"

)

func main() {

    //  Create a listener 

    socket, err := net.ListenUDP("udp4", &net.UDPAddr{

        IP:   net.IPv4(0, 0, 0, 0),

        Port: 8080,

    })

    if err != nil {

        fmt.Println(" Listening to the failure !", err)

        return

    }

    defer socket.Close()

    for {

        //  Read the data 

        data := make([]byte, 4096)

        read, remoteAddr, err := socket.ReadFromUDP(data)

        if err != nil {

            fmt.Println(" Read data failed !", err)

            continue

        }

        fmt.Println(read, remoteAddr)

        fmt.Printf("%s\n\n", data)

        //  To send data 

        senddata := []byte("hello client!")

        _, err = socket.WriteToUDP(senddata, remoteAddr)

        if err != nil {

            return

            fmt.Println(" Sending data failed !", err)

        }

    }

}

Client:

package main

import (

    "fmt"

    "net"

)

func main() {

    //  Create a connection 

    socket, err := net.DialUDP("udp4", nil, &net.UDPAddr{

        IP:   net.IPv4(192, 168, 1, 103),

        Port: 8080,

    })

    if err != nil {

        fmt.Println(" The connection fails !", err)

        return

    }

    defer socket.Close()

    //  To send data 

    senddata := []byte("hello server!")

    _, err = socket.Write(senddata)

    if err != nil {

        fmt.Println(" Sending data failed !", err)

        return

    }

    //  Receive data 

    data := make([]byte, 4096)

    read, remoteAddr, err := socket.ReadFromUDP(data)

    if err != nil {

        fmt.Println(" Read data failed !", err)

        return

    }

    fmt.Println(read, remoteAddr)

    fmt.Printf("%s\n", data)

}

I hope this article has been helpful to you in the programming of Go language.